Telephone set



Patented May 11, 1920.

H. C. EGERTON.

TELEPHONE SET.

. APPLICATION FILED JAN. 28, 1918- citizen of the United States, residinUNITED STATES PATENT OFFICE. I

HENRY C. EGERTON, OF PASSAIC, NEW JERSEY, ASSIGNOR T0 WESTERN ELECTRICCOMPANY, INCORPORATED, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

TELEPHONE SET.

Specification of Letters Patent.

Patented May 11, 1920.

To all whom it may concern:

Be it known that I, HENRY G. EGERTON, a at Iassaic, in the county ofPassaic and tate of New Jersey, have invented certain new and useful Imrovements in Telephone Sets, of which the ollowing is a full, clear,concise, and exact description.

The invention relates to a telephone set and more particularly to a setof the loudspeaking or announcing type.

The set of the invention is particularly designed for use on navalvessels for transmitting orders, and especially for submarine vesselswhere the amount of spaceavailable to accommodate the telephone set is aminimum.

In accordance with a feature of the invention a set is provided in whicha long amplifying path is provided from the receiver in the form of aspirally formed horn which occupies a minimum amount of space.

In order to meet a condition imposed upon the set by the continuousvibration to which it is subjected in service, in accordance withanother feature of the invention, aface or mounting plate is providedwith which the receiver horn and the transmitter mouthpiece areintegral. The horn and transmitter mouthpiece form the sole supports forthe receiver and transmitter.

In the drawing, Figure l is a rear elevation of the set removed from thecasing; Fig. 2 is a longitudinal sectional view through the casingsubstantially on the line 2-2 of Fig. 1; and Fig. 3 is a transversesection substantially on the line'3-3 of Fig. 1.

The entire set, including transmitter and receiver, is inclosed in acasing which may be of metal or other suitable material which, in theembodiment of the invention disclosed, takes the former a rectangularbox indicated at 1. This box or casing may either be built into apartition or suitably secured thereto. Formin a cover for the casing isa cover plate in icated as a whole at 2, which late is adapted to form acomplete cover or the casing and to be attached thereto in any suitablemanner.- Integral with the cover 2 and preferably cast integraltherewith is 'a splral receiver horn 3 and a transmitter mouthpiece 4.Supported solely by the mouthpiece 4 is a transmitter body of the hornby an inte ral Web The transmitter and receiver are associated with asuitable line circuit b means of conductors entering the casing t roughthe tube 16. The conductors are also led through this tube to theterminals of a push button switch 12 which, when depressed, serves toconnect the transmitter in operative relation with a source ofpotential.

The set is particularly adapted to be used in naval vessels and moreparticularly in submarine vessels, and conse uently in order that theorders transmitte set may be audible above the noise incidental to theoperation of the machinery of the submarine vessel, an am lifying hornis essential for the receiver. t is also essential that the set as awhole should occupy a minimum amount of space as space is at a premiumin vessels of this character. The spiral horn of the invention asillustrated and described above rovides a horn having a relatively longamp ifying path and is one which occupies a minimum amount of space. Itwill be readily apparent that the am 1i f ing path of this spiral hornis consi erahly greater than the maximum diagonal dimension of theentirecasing. The receiver horn and transmitter mouthpiece being formedintegral with the mou'ntmg plate and being mounted with the transmitterand receiver respectively, a construction is provided in which there isa minimum number of joints and conse uently one which is afi'ected onlyiua sma 1 do ee b the vibration to which the set is or inar' y subjectedin service. The whole construct on is rigid and compact.

What is claimed is:

1. A telephone set comprising a receptacle, a cover for'said'receptacle, a soundthrough such conducting horn, of substantially theform 10 stricted end.

3. 'A.telephone set comprising a receptacle, a cover, a coiledsound-conducting horn secured to said cover and substantially fillingsaid receptacle, and a telephone instrument associated with said hornwithin the receptacle. t

In witness whereof I hereunto subscribe my name this 25th day ofJanuary, A. D. 1918.

HENRY C. EGERTON.

